Test environment stability improvements (#703)

* Add climate_control gem and test helper

* Replace ENV mods in upgrades test

* Replace ENV mods in registrations test

* Remove ENV references in hostings controller

* Update ENV refs in mailer test

* ActiveStorage cleanup

* Consolidate queue config so appropriate adapter runs in test environment

* Make test environment more explicit

* Centralize self hosting config

* Remove flaky system test

config/environments/development.rb

@@ -76,10 +76,6 @@ Rails.application.configure do
   # Highlight code that enqueued background job in logs.
   config.active_job.verbose_enqueue_logs = true
 
-  # Set Active Job queue adapter
-  config.active_job.queue_adapter = :good_job
-
-
   # Raises error for missing translations.
   # config.i18n.raise_on_missing_translations = true
 

config/environments/production.rb

@@ -61,10 +61,6 @@ Rails.application.configure do
   # Use a different cache store in production.
   # config.cache_store = :mem_cache_store
 
-  # Use a real queuing backend for Active Job (and separate queues per environment).
-  config.active_job.queue_adapter = :good_job
-  # config.active_job.queue_name_prefix = "maybe_production"
-
   config.action_mailer.perform_caching = false
 
   config.action_mailer.default_url_options = { host: ENV["APP_DOMAIN"] }